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타이로드 형상 설계 변수에 따른 좌굴 및 피로 특성 연구
신용상(Yongsang Shin),은효준(Hyojun Eun),이문규(Moonkyu Lee),이희갑(Hee-Gab Lee),추용주(YoungJu Chu),이승엽(Seung-Yop Lee) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
According to the recent trend toward light-weight in the automobile industry, the weight of the outer tie-rod should be reduced. Tie rod is one of important steering components in electric or fuel-cell vehicles as well as conventional internal combustion engine vehicles. Therefore, it is required to develop optimal design and manufacturing process of tie rod for light-weight conditions in various vehicles. In this paper, finite element analysis (FEA) has been carried out to study buckling and fatigue characteristics of aluminum alloy outer tie-rod using the commercial software ABAQUS. In addition, the thickness and the cutting angle of the outer tie-rod neck were set as design parameters to comprehend buckling and fatigue characteristics. It was concluded that the change of thickness showed the direct linear tendency on durability while the altered cutting angle did not show any direct influence.
차량 내부 조향장치 파손방지를 위한 아우터 타이로드의 최적 휨 설계
은효준(Hyojun Eun),신용상(Yongsang Shin),안명훈(Myeonghoon Ahn),정연웅(Yeonwoong Jung),김민준(Minjoon Kim),이문규(Moonkyu Lee),이희갑(Hee-Gab Lee),추용주(YoungJu Chu),이승엽(Seung-Yop Lee) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
In the automobile steering system, Tie-rod acts as a sacrificial part to protect the inner steering gear such as rack and pinion. Therefore, the allowable maximum buckling load is crucial design constraint as well as minimum buckling load. The previous model was recognized to be overdesigned so that it should be remodeled to reduce critical buckling load. In this paper, we showed design method of bent outer Tie-rod giving initial imperfection with eigen buckling mode. However, the bent design brings about mass gain although it makes substantial decrease of critical buckling load. So we set the multi-objective optimizing problem to minimize the value of critical buckling load and mass gain with two kinds of structure design variables – scale factor & bent length. As a result, we obtained the optimum parameters that reduced critical buckling load by 64.96%, and 9.05% mass gain.